Download GTU BE/B.Tech 2019 Summer 5th Sem New 2152409 Microcontroller For Power Electronics Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 5th Sem New 2152409 Microcontroller For Power Electronics Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?V (NEW) EXAMINATION ? SUMMER 2019
Subject Code: 2152409 Date: 03/06/2019

Subject Name: Microcontroller for Power Electronics

Time: 02:30 PM TO 05:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.


Q.1 (a) Draw neat architecture of 8085 microprocessor. 03
(b) Define the terms: address bus, data bus and control bus . 04
(c) Draw and explain the internal block diagram of 8051. 07

Q.2 (a) Give the comparison of microprocessor and microcontroller. 03
(b) Classify memory. Explain EPROM & EEPROM. 04
(c) Define bits of SCON, TCON & PCON registers. 07
OR
(c) Explain SFR (Special Function Register) and PSW (Program Status
Word).
07
Q.3 (a) Define the term Subroutines in accordance with 8051 microcontroller. 03
(b) Explain I/O read-write machine cycle of 8051 microcontroller. 04
(c) Why delay are required during programming and how they are
generated ?
07
OR
Q.3 (a) Draw only timing diagram for memory write cycle. 03
(b) Discuss tri-state logic with necessary examples. 04
(c) What is interrupt? Explain external interrupt with related SFRs. 07

Q.4 (a) Define the term Machine cycle. 03
(b) Classify addressing modes of 8051 microcontroller & Explain any
one in details.
04
(c) It is required to generate a square wave with a frequency of 50 Hz at
P2.2 pin of 8051. Assume that the crystal frequency is 12MHz.
07
OR
Q.4 (a) Give comparison between vectored and non-vectored interrupts. 03
(b) Write a brief note on DAC. 04
(c) It is required to generate a square wave with a frequency of 1 KHz at
P0.0 pin of 8051. With necessary details explain various SFR settings
required and write ISR to fulfill this. Assume that the crystal
frequency is 12MHz.

07
Q.5 (a) What is key de-bounce issue and what are the solutions to avoid that? 03
(b) Explain: LJMP, XCHD, CJNE, NOP 04
(c) Explain keyboard interfacing with 8051 and draw flow chart to detect
and identify key activation.
07
OR

Q.5 (a) Explain the Interfacing of LED with 8051. 03
(b) Write short note on assembler directives. 04
(c) Explain role of Accumulator, Stack Pointer & Program Counter in
any microprocessor/ Controller.
07

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